Make sure when you place little terr cotta pots in your tank you enlarge the drain holes. I just rescued a stuck cory form the drain hole of one of mine!! Whew! Thank goodness I was home and found him in time.
He is looking a bit stressed but I will keep an eye on him......I hope he will be ok. I love my cories! I have enlarged the holes in both of my terra cotta pot "caves". I never even thought about somebody trying to get throught the holes!!